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Production method of non-pulverized thick-specification zinc-iron alloyed plate

A zinc-iron alloy and production method technology, applied in metal material coating process, coating, hot-dip plating process, etc., can solve the problems of bright edge and high powdering level, so as to reduce production cost and solve the problem of coating powdering Effect

Inactive Publication Date: 2015-09-30
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the above-mentioned technical problems and provide a production method of non-powdering thick gauge zinc-iron alloyed plate with simple process, which can effectively solve the problem of excessive pulverization level and bright edge, reduce production cost, and realize continuous on-line production

Method used

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  • Production method of non-pulverized thick-specification zinc-iron alloyed plate
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  • Production method of non-pulverized thick-specification zinc-iron alloyed plate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Annealing: Anneal the steel strip with a thickness of 2.0mm on the continuous production line. The temperature is 461°C.

[0038] 2) Galvanizing: the annealed steel strip is galvanized, the temperature of the zinc bath is controlled at 460°C, the aluminum content of the zinc bath is 0.13wt%, and the galvanizing time is 7 seconds. figure 1 .

[0039] 3) Alloying: The galvanized steel strip (that is, the galvanized sheet) enters the alloying furnace before the coating is solidified. The high-frequency induction power is set at 480KW, and the galvanized sheet is heated to 530°C within 5S, and then carried out Heat preservation, control the heat preservation time to 14s, and the heat preservation temperature to 420°C, to obtain the microscopic surface morphology of the alloyed plate see figure 2 .

[0040] 4) Leveling: The alloyed plate is leveled, using a leveling roll with a roughness Ra of 2.0, and the rolling force tonnage of the system is set to 200 tons to ens...

Embodiment 2

[0043] 1) Annealing: Anneal the strip steel with a thickness of 1.8mm on the continuous production line. The running speed on the continuous production line is 42m / min, the temperature of the preheating furnace is 650°C, the reduction annealing temperature is 735°C, and the temperature of the zinc pot is 462°C .

[0044] 2) Galvanizing: the annealed steel strip is galvanized, the temperature of the zinc solution is controlled at 460°C, the aluminum content of the zinc solution is 0.135wt%, and the galvanizing time is 6 seconds to obtain a galvanized sheet.

[0045] 3) Alloying: The galvanized steel strip (that is, the galvanized sheet) enters the alloying furnace before the coating is solidified. The high-frequency induction power is set at 510KW, and the galvanized sheet is heated to 520°C within 5S, and then carried out For heat preservation, the heat preservation time is controlled to be 13s, and the heat preservation temperature is 430°C to obtain an alloyed plate.

[004...

Embodiment 3

[0049] 1) Annealing: Anneal the strip steel with a thickness of 1.7mm on the continuous production line. The running speed of the strip steel on the continuous production line is 48m / min. The temperature is 463°C.

[0050] 2) Galvanizing: the annealed steel strip is galvanized, the temperature of the zinc solution is controlled at 462° C., the aluminum content of the zinc solution is 0.125 wt%, and the galvanizing time is 6 seconds to obtain a galvanized sheet.

[0051] 3) Alloying: The galvanized steel strip (that is, the galvanized sheet) enters the alloying furnace before the coating is solidified. The high-frequency induction power is set at 530KW, and the galvanized sheet is heated to 520°C within 5S, and then carried out For heat preservation, the heat preservation time is controlled to be 12s, and the heat preservation temperature is 440°C to obtain an alloyed plate.

[0052] 4) Leveling: The alloyed plate is leveled, using a leveling roll with a roughness Ra of 2.0, a...

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Abstract

The invention discloses a production method of a non-pulverized thick-specification zinc-iron alloyed plate. The method solves the problems that an existing thick-specification zinc-iron alloyed plate is serious in pulverization, large in shear mount and the like. According to the technical scheme, strip steel with the thickness ranging from 1.6mm to 2.0mm is annealed, galvanized, alloyed, flattened, cut and the like on a continuous production line to obtain the zinc-iron alloyed plate. According to the galvanization step, the temperature of galvanized zinc is controlled to 460+ / -5 DEG C, dipping time ranges from 5 seconds to 7 seconds, and the content of galvanized zinc aluminum ranges from 0.12wt% to 0.14 wt%. The method is simple in technology and can effectively solve the problems of the too high pulverization level and side brightening, and the production cost is reduced.

Description

technical field [0001] The invention relates to the metallurgy industry, in particular to a production method of a zinc-iron alloyed plate. Background technique [0002] The ordinary galvanized layer is composed of an alloy layer close to the steel base inside and a pure zinc layer with a smooth outer surface and beautiful spangles. According to the needs, the pure zinc layer can be transformed into an iron-zinc alloy layer σ through certain treatment methods 1 Mutually. This treatment method is called galvanized layer alloying treatment, or zinc layer annealing of galvanized sheet. [0003] After alloying, the surface of the hot-dip galvanized sheet loses its spangle luster and presents a silvery white or dark gray appearance. The toughness of the galvanized layer has no significant change from that before treatment, and it can be processed by more complicated bending and forming. This product has good weldability, coating property, heat resistance and corrosion resistan...

Claims

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Application Information

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IPC IPC(8): C23C2/40C23C2/06
Inventor 万江肖杰李淼王伟波徐小焱
Owner 武汉钢铁有限公司
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